BRP 428.0 Caney Fork Overlook EarthCache

This cache has been archived.

rainbowtree: DO NOT post a log to this cache.
If you choose to disregard CO's request and log this archived cache, be sure you have the following ...
1. Pics at the required coordinates with you or your signature item as verification of visit.
2. All questions completely/thoughtfully answered.
A special thank you to those who completed all the requirements as requested -and- added the Journeys to your log.
Location and content gifted to a special cacher for development of a new EarthCache.

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Hidden : 6/1/2017
Difficulty:
1.5 out of 5
Terrain:
1.5 out of 5

Size: Size: other (other)

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Geocache Description:

BLUE RIDGE PARKWAY OVERLOOKS GEOLOGY TOUR
There are countless wonders to behold along your journey.
Posted coordinates are for parking. - Outcrops are within 100 feet.

EARTHCACHE REQUIREMENTS
Each cacher must send his/her own answers BEFORE logging a find. Enjoy the journey (learning adventure) as well as the destination (smiley earned). Remember to take only pictures and leave only footprints. To get credit for this Earthcache, complete the following tasks:

1. MESSAGE …. What is a pegmatite?

2. MESSAGE …. Describe (qualitative and quantitative) the pegmatite you observe within the outcrop. Include whether the intrusions are sills, dikes, or a combination. Include the number and size of inclusions present in this outcrop. What is the average size of crystals?

3. LOG …. Post a picture at or near the coordinates. This picture is your log signature.

OPTIONAL - Please respect the time and effort involved in finding and creating this earthcache by adding A and B to your log.

A. JOURNEY OF THE MIND ... Science explains what we observe. Relate (in your own words) something you found interesting in the reading. This adds to your learning adventure and your log.

B. JOURNEY OF THE HEART ... Art shares our personal experience of what we see. Share something special you found on site, and why it is special to you. This is a memorable addition to your log and will make other hearts smile.

THANK YOU Mark W. Carter for permission to use your book for this earthcache.
THANK YOU Lillian for permission to place this earthcache along the Blue Ridge Parkway.


IGNEOUS ROCKS (formed from fiery molten magma)
Igneous rocks are formed from magma, the molten form of the earth’s mantle layer. Igneous rocks can form above ground as lava spewing from volcanoes. Igneous rocks can also form below the surface. Pockets of magma get stuck in layers of the earth. As they get closer and closer to the surface, the magma slowly cools.

SEDIMENTARY ROCKS (formed by weathering)
Sedimentary rocks form from small weathered particles of other rocks or the weathered shells of sea animals. Wind and rain beating on the faces of exposed rock wear off particles that are blown or washed to a new location. When sea creatures die, the shells settle on the bottom of the ocean. As the sediments pile up, they press together to form sedimentary rock.

METAMORPHIC ROCKS (formed under intense heat and pressure)
Metamorphic rocks form under intense heat and pressure. Metamorphic rocks start out as igneous rocks, sedimentary rocks or other types of metamorphic rocks. Through heat and/or pressure, the rocks change characteristics such as sheen, tightness of grain and hardness.



PEGMATITES

Igneous rocks that form during the final stage of a magma's crystallization. They contain exceptionally large crystals and they sometimes contain minerals that are rarely found in other types of rocks.

OUTCROP

-The pegmatites at this overlook were formed by intrusion of molten rock material along fractures in the gneiss. The molten material was probably derived from partial melting of nearby rock during Taconic metamorphism. The abrupt termination at the top end of the largest pegmatite may be the result of faulting.
-An igneous intrusion is a rock formed from magma and cooled beneath the surface. If the intrusion moves sideways along weaknesses between rock layers, it is called a sill. If the intrusion moves upwards and cuts across rock layers, it is called a dike.
-The Taconic orogeny was a mountain building period that ended 440 million years ago. Igneous rock between the land masses were intensely folded and faulted, and were subjected to varying degrees of intense metamorphism.

RESOURCE
A Geologic Adventure Along The Blue Ridge Parkway in North Carolina by Carter/Merschat/Wilson ... 2001
Rock Sentinels EC - GC1FKJV

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